Electroplating wastewater discharged after production has many kinds, complex water quality and great toxicity. In addition to cyanide-containing wastewater and acid-base wastewater, it also contains various additives such as heavy metal ions (such as Cr, Cd, Ni, Au) and surfactants, which must be treated before being discharged. At present, the commonly used electroplating wastewater treatment methods include chemical method, biological method, physical-chemical method and electrochemical method, and the decoloring agent for treating the chromaticity of this kind of wastewater and heavy metal substances in the wastewater is an essential link. Therefore, the decoloring agent can not only quickly flocculate and decolor the color in wastewater, but also reduce the COD, heavy metals and other substances in wastewater, and solve the water pollution problem at one time through mud-water separation. Treatment steps: only three steps are needed: 1. Add two thousandths of decolorant, 2. Adjusting the PH value of wastewater to about 7-8; 3. Adding polyacrylamide (PAM) to accelerate flocculation and precipitation. The operation process is very simple, and the adaptability is strong. The treated water supernatant is clear and bright, and there is no need to worry about the color reversal after long-term storage.
Finally, if you want to achieve the effect of recycling emissions, you can combine biochemical systems.